UIKi UITabBarController Storybook tvOS

UIKitUITabBarControllerStorybook.swift

//
//  UIKitUITabBarControllerStorybook.swift
//  TemplateAppTvOS
//
//  Created by Mert Vurgun on 21.08.2024.
//

import UIKit

class UIKitUITabBarControllerStorybook: UITabBarController, UITabBarControllerDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()

        // MARK: 1. Set the delegate
        delegate = self
        
        // MARK: 2. Initialize View Controllers
        // Each view controller is created, customized, and assigned to a tab bar item.
        let homeViewController = UIKit_HomeViewController()
        homeViewController.view.backgroundColor = .red
        homeViewController.tabBarItem = UITabBarItem(title: "Home", image: UIImage(systemName: "house.fill"), tag: 0)

        let searchViewController = UIKit_SearchViewController()
        searchViewController.view.backgroundColor = .black
        searchViewController.tabBarItem = UITabBarItem(title: "Search", image: UIImage(systemName: "magnifyingglass"), tag: 1)

        let settingsViewController = UIKit_SettingsViewController()
        settingsViewController.view.backgroundColor = .yellow
        settingsViewController.tabBarItem = UITabBarItem(title: "Settings", image: UIImage(systemName: "gearshape"), tag: 2)
        
        // MARK: 3. Assign View Controllers to the Tab Bar
        // The viewControllers property of the UITabBarController is set with the array of view controllers.
        viewControllers = [homeViewController, searchViewController, settingsViewController]
    }
    
    // MARK: 4. Handle Tab Bar Controller Delegate Method
    // This method is called when the user selects a different tab.
    func tabBarController(_ tabBarController: UITabBarController, shouldSelect viewController: UIViewController) -> Bool {
        
        // Ensure that the currently selected view and the newly selected view are not nil.
        guard let fromView = selectedViewController?.view, let toView = viewController.view else {
            return false
        }

        // MARK: 5. Check and Animate Transition
        if fromView != toView {
            UIView.transition(from: fromView, to: toView, duration: 0.3, options: [.transitionCrossDissolve], completion: nil)
        }

        return true
    }
}